CN217977415U

CN217977415U - Pneumatic conveying valve and valve core thereof

Info

Publication number: CN217977415U
Application number: CN202222612028.3U
Authority: CN
Inventors: 许兆华; 曹正国
Original assignee: Geya Xinghua Technology Development Beijing Co ltd
Current assignee: Geya Xinghua Technology Development Beijing Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-12-06
Anticipated expiration: 2032-09-30

Abstract

The utility model provides a pneumatic conveying valve and case thereof, the case has: the valve comprises a top cover part used for opening and closing a valve channel and a supporting part used for connecting a driving mechanism to change the position of the top cover part, wherein the top surface of the top cover part is in a circular shape on the same plane, and the side surface of the periphery of the top cover part of the valve core is a smooth transition surface. The utility model discloses the top cap portion of case is when being driven the state that the upset valve was opened, for current dome valve, increased with the clearance of sealing washer, has reduced the contact of case top and sealing washer, even if the case is under the condition with the ash dirt, also can reduce the wearing and tearing to the sealing washer, has increased the life of sealing washer, reduces the valve and damages the probability to effect such as prevent environmental pollution, reduce cost has been realized.

Description

Pneumatic conveying valve and valve core thereof

Technical Field

The utility model relates to a pneumatic conveying equipment field especially relates to a pneumatic conveying valve and case thereof.

Background

The dome valve is the utility model's of seventy years initial stage dust removal special valve, as shown in fig. 1, the dome valve passes through 5 drives of actuating mechanism such as cylinders, when the valve is closed, uses dedicated gas circuit and limit switch to aerify for sealing washer 3, and the sealing washer is special rubber products, holds the calotte tightly through the deformation of sealing washer, reaches the purpose of valve seal, judges through one set of pressure measurement device whether sealed normal.

Generally, the dome valve is of a cast iron shell structure, and the internal transmission shaft 4 is two sets of half shafts and drives a dome to rotate in a reciprocating manner at 90 degrees, so that the opening and closing of the valve are achieved. Due to the adoption of the half shaft design, the flow area of the material is equal to the drift diameter of the valve when the dome valve is opened, and the dome is hidden at the lower part of the top plate, so that the material is subjected to zero abrasion when passing through the valve; due to the special design of the dome valve, in addition to the special sealing form, the valve is widely applied to pneumatic conveying systems for powdery materials.

The existing commonly used dome valve is more suitable for the field of pneumatic transportation, the flexible seal has superior sealing effect on gas, and the equipment operates stably under the relatively ideal state of conveying media and conveying air components. However, with the popularization of the application range of the dome valve, once the quality of the conveying medium changes, such as the abrasive property is increased and the corrosivity is enhanced, when the water content of the conveying air and the corrosive component are changed, the technical defects of the existing dome valve obviously appear in a pneumatic conveying state, mainly the sealing ring is frequently damaged, the valve is further damaged, and the fault of the whole conveying system is caused. As shown in fig. 1, fig. 1 is a schematic view of a dome valve of the prior art, which mainly has the following disadvantages:

disadvantage 1: the structure is shown. Because the valve core 1 of the dome valve adopts a hemispherical dome form, the material generally adopts common ductile iron or cast steel, the strength is not suitable for the conveying medium with higher grindability, the dome is worn or scoured into a ditch frequently, gas leakage and material leakage are formed, and then a sealing ring and a valve body are damaged, the fault of a conveying pump is caused, and the environmental pollution is caused.

And (2) disadvantage: the conveying medium has poor adaptability. The hemisphere structural style rises along with conveying medium corrosivity and scale deposit nature, and the scale deposit phenomenon often appears, has increased the probability that mix with the bigger aperture material between calotte and the sealing washer, causes the frequency that the sealing washer damage phenomenon takes place to increase, has increased the goods and materials and the cost of labor of maintaining the operation.

Disadvantage 3: the requirements on the composition of the conveying air are high. When the seasonal variation or the working condition of the air compressor changes, the components of the conveying medium change frequently along with the change of the water content and the oil content of air, so that the top of the ball is scaled and corroded, and the valve is damaged.

And 4, a defect: the spare parts are costly. The sealing ring equipped for the valve has to have higher flexibility, wear resistance and higher manufacturing precision, the common sealing ring can not meet the use requirement, the special rubber sealing ring imported from abroad is usually required to be used, the cost is very high, the supply period is longer, the sealing ring is frequently replaced, the sealing ring is replaced at least once in 1 year under common conditions, and a complete minor repair period can not be reached; the quality requirements of the cylinder and the limit switch equipped for the valve are also higher, so that the maintenance cost of the valve is higher.

Therefore, there is a need for an innovative pneumatic conveying valve to reduce leakage, enhance adaptability of conveying media, reduce scaling and corrosion, and reduce cost.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiments of the present invention provide a pneumatic conveying valve and a valve element thereof, so as to eliminate or improve one or more defects existing in the prior art.

The technical scheme of the utility model as follows:

a valve cartridge for a pneumatic transfer valve, the valve cartridge having: the valve comprises a top cover part used for opening and closing a valve channel and a supporting part used for connecting a driving mechanism to change the position of the top cover part, wherein the top surface of the top cover part is in a circular shape on the same plane, and the side surface of the periphery of the top cover part of the valve core is a smooth transition surface.

Optionally, the valve core is provided with a protective layer at least on the top surface of the top cover part, and the thickness of the protective layer is not less than 0.3mm.

Optionally, the valve core is provided with a protective layer on the top surface and the peripheral side surface of the top cover part, and the thickness of the protective layer is not less than 0.3mm.

Optionally, the protective layer is formed by electroplating or spraying, and is made of chromium, nickel alloy or tungsten carbide.

Optionally, the hardness of the protective layer is not less than 800HV.

Optionally, the top cover part and the support part are integrally formed or connected by welding, inserting, riveting or threaded connection; the supporting parts are symmetrically arranged at the edge part of the bottom of the top cover part.

Optionally, the peripheral side surface of the top cover part is a chamfer, a fillet or a combination of chamfer and fillet.

A pneumatic transmission valve comprises a valve body, a valve core and an inflatable flexible sealing ring, wherein the shape of a top cover part of the valve core corresponds to the shape of a channel of the valve body, and the top surface of the top cover part can completely cover the channel; the peripheral side surface of the top cover part of the valve core corresponds to the position of the inflatable flexible sealing ring.

Optionally, the valve body comprises: the upper valve body is connected with the lower valve body through a connecting piece; the inflatable flexible sealing ring and the valve core are arranged at the connecting position of the upper valve body and the lower valve body.

The utility model provides a pneumatic conveying valve and case thereof, the top cap portion of this case is when being driven the upset state that the valve was opened, for current calotte valve, increased with the clearance of sealing washer, reduced the contact of case top and sealing washer, even if the case is under the condition with the ash dirt, also can reduce the wearing and tearing to the sealing washer, increased the life of sealing washer, reduced the valve and damaged the probability to realized preventing effects such as environmental pollution, reduce cost.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the following detailed description.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. For convenience in illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary device actually manufactured according to the present invention. In the drawings:

figure 1 is a schematic view of a dome valve of the prior art.

Fig. 2 is a schematic perspective view of a valve element for a pneumatic conveying valve according to an embodiment of the present invention.

Fig. 3 is a schematic sectional view of the pneumatic conveying valve in an assembled state according to an embodiment of the present invention.

Reference numerals:

1. a valve core; 110. a top cover portion; 111. a top surface; 112. a peripheral side; 120. a support portion; 121. a connection post portion; 122. A shaft seat portion; 2. a valve body; 21. an upper valve body; 22. a lower valve body; 3. an inflatable flexible sealing ring; 4. a drive shaft; 5. A drive mechanism;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.

It is also noted herein that the term "coupled," if not specifically stated, may refer herein to not only a direct connection, but also an indirect connection in which an intermediate is present.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar components, or the same or similar steps.

The utility model provides a pneumatic conveying valve and case thereof, this pneumatic conveying valve become planar structure with its dome structure through changing the case structure to multiplicable inoxidizing coating will hang down the probability that the valve damaged greatly, and then reach the effect that prevents environmental pollution, also can be better be suitable for the quality change of carrying the medium and reduce the requirement for quality to the sealing washer.

According to an aspect of the utility model, as shown in fig. 2, the utility model provides a case 1 for pneumatic conveying valve, case 1 has: the valve comprises a top cover part 110 for opening and closing a valve channel and a support part 120 for connecting a driving mechanism 5 to change the position of the top cover part 110, wherein the top surface 111 of the top cover part 110 is a circular surface positioned on the same plane, and the valve core 1 is a smooth transition surface on the peripheral side surface 112 of the top cover part 110.

In this embodiment, when the top cover portion 110 of the valve element 1 is driven to turn over to the valve opening state, compared with the existing dome valve, the gap between the top cover portion 110 of the valve element 1 and the sealing ring is increased, and the contact between the top of the valve element 1 and the sealing ring is reduced, so that even if the valve element 1 is attached with dust, the abrasion to the sealing ring can be reduced, the service life of the sealing ring is prolonged, the valve damage probability is reduced, and the effects of preventing environmental pollution, reducing cost and the like are achieved.

In some embodiments, the cartridge 1 has a protective layer at least on the top surface 111 of the top cover part 110, the thickness of the protective layer being not less than 0.3mm; optionally, the thickness of the protective layer is not less than 0.5mm. The thickness of the protective layer is smaller than that of the top cover part 110 of the whole valve core 1, and the protective layer is directly attached and molded on the top surface 111 of the top cover part 110, so that a concave structure does not need to be processed downwards, and the processing technology and the manufacturing cost are reduced.

In this embodiment, the hardness, corrosion resistance and water resistance of the entire valve element 1 can be increased by the protective layer, the valve element can adapt to the erosion of high-strength abrasive media, the protective layer has better corrosion resistance and is not easy to scale, the problem that the sealing ring and the valve body 2 are damaged due to the fact that the top cover part 110 is abraded can be effectively solved, and the service life of the valve is greatly prolonged.

Further, the valve core 1 has a protective layer on both the top surface 111 and the peripheral side surface 112 of the top cover part 110, and the thickness of the protective layer is not less than 0.3mm. Optionally, the thickness of the protective layer is not less than 0.5mm. It will be appreciated that the top surface 111 and the peripheral side surface 112 of the top cover portion 110 define a side that intercepts the conveyed media, while the inner side, although less contacting the conveyed media, may also have a barrier layer structure.

In some embodiments, the protective layer is formed by electroplating or spraying, and is made of chromium, nickel alloy or tungsten carbide, and it is to be understood that the processing method and material of the protective layer are not limited thereto, and other processes and materials may be used. Optionally, the hardness of the protective layer is not less than 800HV.

In some embodiments, as shown in fig. 2, the peripheral side 112 of the cover dome section 110 is chamfered, radiused, or a combination of chamfered and radiused configurations. In other words, the peripheral side surface 112 of the cover dome portion 110 may be a tapered surface or a curved surface with a certain curvature.

As shown in fig. 2, in some embodiments, the top cover part 110 and the supporting part 120 are integrally formed or connected by welding, plugging, riveting, or screw connection; the supporting parts 120 are symmetrically arranged at the edge portions of the bottom of the top cover part 110. The two support portions 120 may be symmetrically disposed, and include a connection pillar portion 121 and a shaft seat portion 122, the shaft seat portion 122 is used for connecting a transmission shaft, and the connection pillar portion 121 is used for providing a certain support and distance for the rotation of the top cover portion 110. The structure of the supporting portion 120 and the connecting structure of the supporting portion 120 and the top cover portion 110 may adopt the related solution of the dome valve in the prior art, and are not described herein again.

According to another aspect of the present invention, the present invention also provides a pneumatic conveying valve, as shown in fig. 3, the valve comprises a valve body 2, the valve core 1 and an inflatable flexible sealing ring 3. The shape of the top cover part 110 of the valve core 1 corresponds to the shape of the channel of the valve body 2, and the top surface 111 of the top cover part 110 can completely cover the channel; the peripheral side surface 112 of the top cover part 110 of the valve core 1 corresponds to the position of the inflatable flexible sealing ring 3. The valve body 2 and the inflatable flexible sealing ring 3 can adopt the related scheme of the dome valve in the prior art, and the description is omitted.

In some embodiments, the valve body 2 may comprise: the valve comprises an upper valve body 21 and a lower valve body 22, wherein the upper valve body 21 and the lower valve body 22 are connected through a connecting piece; the connecting piece can be a bolt or a screw; for enhancing the sealing, a sealing gasket or the like may be provided between the upper valve body 21 and the lower valve body 22. The inflatable flexible sealing ring 3 and the valve core 1 are arranged at the connecting position of the upper valve body 21 and the lower valve body 22.

The material of the inflatable flexible sealing ring 3 can be silicon rubber, fluorine rubber and butadiene-acrylonitrile rubber. The valve core 1 is the only movable part in the valve and has the function of blocking, isolating and conveying media, the part of the top of the valve core corresponding to the pipeline is horizontal, and the part of the periphery of the valve core contacting with the sealing ring is arc-shaped. The conveying medium refers to materials conveyed by air, and comprises granular, powdery and similar products and the like.

The utility model discloses case 1 accessible transmission shaft 4 and actuating mechanism 5 of embodiment drive. Specifically, the valve core 1 is connected with the transmission shaft 4 through the shaft seat portion 122 of the support portion 120, and the transmission shaft 4 may be a stepped shaft, and may also be provided with a bearing assembly and a corresponding sealing assembly. The valve core 1 and the transmission shaft 4 can be fixed by pins, set screws and the like. The structure of the transmission shaft 4 can adopt the related structure of the existing dome valve, and the description is not repeated. The driving mechanism 5 can adopt a linear reciprocating driving mechanism 5 such as an air cylinder, a hydraulic cylinder, a linear motor and the like, and is converted into the rotary motion of the transmission shaft 4 through a crank or rocker mechanism, and the driving mechanism 5 can also adopt a driving transmission structure such as a motor, a gear, a belt transmission, a chain transmission and the like.

In order to distinguish from dome valves in the prior art, the pneumatic conveying valve of the embodiment of the present invention can also be referred to as a flat top valve. The flat top valve is adaptable to new valve design configurations as well as to retrofit old dome valves.

Firstly, for a new valve design structure, a whole flat-top valve can be used as a key part of a delivery pump, the flat-top valve can be well adapted to working conditions of delivering media and delivering air, the whole manufacturing cost and the subsequent operation and maintenance cost are saved, and the aims of energy conservation and emission reduction are favorably fulfilled. Secondly, for the existing system adopting the dome valve, the logic program and the interface size of the original system can be completely unchanged by replacing the dome valve with the flat-top valve, and the stability of the system is kept to the maximum extent; for delivery systems using other types of valves, flat top valves can also be used perfectly by changing the flange size, making slight logic program adjustments. Thirdly, to existing dome valve can carry out partial structural component (mainly change case 1) and change for flat top valve, and specific step flow is for demolising the dome valve, and the dome is changed for the flat top, and other parts are good for under the condition that does not see the damage, can furthest practice thrift the cost, can drive the commonalization or the localization of sealing washer, and furthest practices thrift maintenance fund and purchasing cost.

Tests prove that after the dome of the dome valve is changed into a flat top, the flat top has no wear phenomenon after years of operation, the phenomena of scale formation and rusting of a large amount of ball tops of the existing dome valve are effectively avoided, the replacement frequency of the sealing ring is greatly reduced, and the equipment is safe and reliable in operation.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve cartridge for a pneumatic transfer valve, the valve cartridge having: a top cover part (110) for opening and closing a valve passage and a support part (120) for connecting a drive mechanism (5) to change the position of the top cover part (110),

the top surface (111) of the top cover part (110) is circular and is positioned on the same plane, and the valve core is a smooth transition surface on the peripheral side surface (112) of the top cover part (110).

2. Valve cartridge for pneumatic conveying valve according to claim 1, characterized in that it has a protective layer at least on the top surface (111) of the top cover part (110), the thickness of the protective layer being not less than 0.3mm.

3. Valve cartridge for pneumatic conveying valve according to claim 1, characterized in that it has a protective layer with a thickness not less than 0.3mm on both the top face (111) and the peripheral side face (112) of the top cover part (110).

4. The valve core for pneumatic transmission valve according to claim 2 or 3, wherein the protective layer is formed by electroplating or spraying, and is made of chromium, nickel alloy or tungsten carbide.

5. The valve cartridge for pneumatic conveying valve according to claim 4, characterized in that the hardness of said protective layer is not less than 800HV.

6. The valve core for pneumatic conveying valve according to claim 1, wherein the top cover part (110) and the support part (120) are integrally formed or connected by welding, inserting, riveting, screw connection;

the supporting parts (120) are symmetrically arranged at the edge portions of the bottom of the top cover part (110).

7. Valve cartridge for pneumatic conveying valves according to claim 1, characterized in that the peripheral side face (112) of the cover dome section (110) is chamfered, rounded or a combination of chamfered and rounded structures.

8. A pneumatic transmission valve, comprising a valve body (2), a valve core and an inflatable flexible sealing ring (3), wherein the valve core is the valve core of any one of claims 1 to 7;

the shape of the top cover part (110) of the valve core corresponds to the shape of the channel of the valve body (2), and the top surface (111) of the top cover part (110) can completely cover the channel;

the peripheral side surface (112) of the top cover part (110) of the valve core corresponds to the position of the inflatable flexible sealing ring (3).

9. Pneumatic conveying valve according to claim 8, characterized in that said valve body (2) comprises: the valve comprises an upper valve body (21) and a lower valve body (22), wherein the upper valve body (21) and the lower valve body (22) are connected through a connecting piece;

the inflatable flexible sealing ring (3) and the valve core are arranged at the connecting position of the upper valve body (21) and the lower valve body (22).